This issue can actually be very blocker to you if your mobile web application contains many openers that utilize the z-index CSS property in order to appear on the top of the active mobile view. This is because when the application’s opener is active and due to this bug, you can find the underlying mobile view input elements highlighted (focused) on the top of the opener as shown in the figure below.

In order to resolve this issue, I applied the following solution that works with me:1. When a new opener is opened:
All of the *relevant* underlying input elements inside the view must be disabled. Doing this fix will disable the keyboard interaction with the underlying input elements and in the same time will not allow these input elements to be *focused*.

2. When the opener is closed:
All of the disabled input elements in the first step can be re-enabled again.

The solution looks complex, however, it can help if you have a similar situation.